1 Answer
Self-induction is the phenomenon where a changing current in a coil (or in any electrical conductor) induces a voltage within the same coil. This happens due to the magnetic field created by the current flowing through the coil. As the current changes (either increases or decreases), it causes a change in the magnetic field around the coil, which, in turn, induces a voltage in the coil itself.
This induced voltage opposes the change in current, according to **Lenz's Law**, which is a consequence of **Faraday's Law of Induction**.
The property of a coil or inductor to resist changes in current due to self-induction is measured by its **inductance (L)**. The larger the inductance, the more it resists changes in current.
### Example:
Imagine you have a coil and you suddenly try to increase the current flowing through it. The changing current creates a changing magnetic field, and this induces a voltage that opposes the increase in current. The induced voltage acts like a "resistor" to the change in current.
In simpler terms, self-induction is like a coil "fighting" against sudden changes in the current that passes through it.
This induced voltage opposes the change in current, according to **Lenz's Law**, which is a consequence of **Faraday's Law of Induction**.
The property of a coil or inductor to resist changes in current due to self-induction is measured by its **inductance (L)**. The larger the inductance, the more it resists changes in current.
### Example:
Imagine you have a coil and you suddenly try to increase the current flowing through it. The changing current creates a changing magnetic field, and this induces a voltage that opposes the increase in current. The induced voltage acts like a "resistor" to the change in current.
In simpler terms, self-induction is like a coil "fighting" against sudden changes in the current that passes through it.